POWER AVAILABILITY
MAINTENANCE BYPASS CABINET FOR NFINITY™
& GXT 10KVA
USER MANUAL
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.0
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1
System Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1.1
1.1.2
1.1.3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Standard Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.0
MODES OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.1
UPS Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2
Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.0
MAJOR COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.1
Bypass Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2
User Selectable Output Distribution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2.1
Optional Transformer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.0
PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.1
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3
Required Setup Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.4
Site Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.0
UNLOADING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.1
Unloading the Maintenance Bypass Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.2
Stationary Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.0
CABLE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.1
Wiring Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2
Preparing Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.3
Dual Source Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.4
Removing the Cover Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.5
Power Cable Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.6
REPO Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.7
Input and Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.0
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
7.1
Start-Up and Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.2
Shutting Down the UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.3
Transferring the System from UPS to Maintenance Bypass Operation . . . . . . . . . . . . . . . . 22
7.4
Transferring the System from Maintenance Bypass to UPS Operation . . . . . . . . . . . . . . . . 22
i
8.0
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.1
Proper Care. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.2
Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.2.1
9.0
Replacing Fan Filters—Transformer Models Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
FIGURES
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Rear view (without transformer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Rear view (with transformer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bypass operation modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Jumper removal—transformer models and non-transformer models . . . . . . . . . . . . . . . . . . . . . . 12
Maintenance Bypass Cabinet with transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Maintenance Bypass Cabinet without transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electrical connections—transformer model MBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Electrical connections—non-transformer model MBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Connecting Nfinity to Maintenance Bypass with transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Connecting Nfinity to Maintenance Bypass without transformer . . . . . . . . . . . . . . . . . . . . . . . . 19
Connecting Maintenance Bypass to GXT10000T-208X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Connecting Maintenance Bypass to GXT10000T-240X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
TABLES
Table 1
Table 2
Table 3
Table 4
Common receptacle and hardwire options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance Bypass Cabinet physical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Nfinity power cable and protection ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
GXT 10kVA power cable & protection ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
ii
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be closely followed during installation and
maintenance of this Maintenance Bypass Cabinet.
This product is designed for commercial/industrial use only. This product is not intended for use with
life support and other designated “critical” devices. Maximum load must not exceed that shown on the
UPS and the Maintenance Bypass Cabinet rating label.
!
WARNING
Lethal voltages may be present within this unit even when it is apparently not operating.
Observe all cautions and warnings in this manual. Failure to do so may result in serious
injury or death. Never work alone.
The Nfinity Maintenance Bypass Cabinet is designed for use on properly grounded (earthed)
208/240VAC, 60Hz supply, for installation by qualified personnel. This UPS equipment is intended to
be installed by a qualified / certified electrician who must review and approve customer supplied wiring, circuit breakers, intended loads and verify correct input, output and grounded (earthed) connections to ensure compliance with technical standards and national and local electrical codes.
Installation instructions and warning notices are located in the Installation section of this manual.
!
WARNING
To reduce the risk of fire:
• The NMB1x and NMB4x models must be connected to a circuit provided with 100 amperes
maximum branch circuit overcurrent protection in accordance with applicable national and
local electrical codes.
• The NMB5x and NMB8x models must be connected to a circuit provided with 125 amperes
maximum branch circuit overcurrent protection in accordance with applicable national and
local electrical codes.
Operate the UPS equipment in an indoor environment only in an ambient temperature range of 32°F
to 104°F (0°C to 40°C). Install it in a clean environment, free from conductive contaminants, moisture, flammable liquids, gases, or corrosive substances.
Never block or insert any object into the ventilation holes or other openings.
1
GLOSSARY OF SYMBOLS
Risk of Electrical Shock
Indicates Warning or Caution Followed by Important Instructions
AC Input
AC Output
i
Requests the user to consult the manual
Equipment Grounding Conductor
ON
OFF
2
General Description
1.0
GENERAL DESCRIPTION
Congratulations on your purchase of Liebert’s Nfinity™ Maintenance Bypass Cabinet with Configurable Output Distribution. As with every Liebert product, we stand behind our quality. If you have
any questions concerning this Maintenance Bypass Cabinet, please feel free to contact your local
dealer, Liebert representative, or call the appropriate Technical Support number listed on the back of
this manual.
To ensure proper installation and operation of this unit, please read this manual thoroughly.
Installation must be done by a qualified/certified electrician, but general operation may be performed
without special training.
1.1
System Description
The Liebert Nfinity Maintenance Bypass Cabinet is intended for use with the Nfinity UPS. Typical
applications include supporting workstations, servers, network, telecom or other sensitive electronic
equipment.
The Nfinity Maintenance Bypass Cabinet was designed to provide maximum system availability to
business critical equipment. The Nfinity Maintenance Bypass Cabinet allows for transfer of connected loads to an alternate power path allowing full isolation of the UPS. The UPS can then be
turned “OFF” and removed from service with no interruption of power to connected loads.
1.1.1
Features
•
•
•
•
•
1.1.2
Standard Components
•
•
•
•
•
•
1.1.3
Supports up to 20 kVA loads
High speed transfer switch
Compact design
Highly configurable
Multiple power path indicators
Casters and leveling feet
Easily accessible terminal blocks
Supports Lockout/Tagout Program
Support/mounting brackets for additional stability
Provisions for hardwire output
Dual-source compatible for increased availability
Options
• Output transformer for isolation
• Field-installable output distribution
3
General Description
Figure 1
Front view
Output breaker
(CB1)
Bypass availability
indicator (amber)
UPS output
availability
indicator
(green)
Bypass switch
(SW1)
UPS input power
present (amber)
UPS input
switch (SW2)
Cooling fans
(transformer
models only)
Support bracket
4
General Description
Figure 2
Rear view (without transformer)
Configurable output
distribution (optional)
Hardwire output
(standard)
Hardwire output
terminal block (TB5)
UPS input (TB3)
UPS output (TB4)
Maintenance bypass
input (TB2)
Maintenance bypass
input (TB1)
Support bracket
5
General Description
Figure 3
Rear view (with transformer)
Configurable output
distribution (optional)
Hardwire output
(standard)
Hardwire output
terminal block (TB6)
UPS output (TB5)
Tap selector (TB4)
Maintenance bypass
input (TB1) (TB2)
UPS input (TB3)
Support bracket
6
Modes of Operation
2.0
MODES OF OPERATION
The Nfinity Maintenance Bypass Cabinet is designed to operate in two modes: UPS Mode and Bypass
Mode.
2.1
UPS Mode
While the Nfinity Maintenance Bypass Cabinet is in UPS Mode, the UPS is supplying the connected
load with continuous, high quality AC power. In this mode of operation, the load is protected by the
UPS. The Bypass Switch rotated toward the green lamp indicates this mode.
2.2
Bypass Mode
When the Nfinity Maintenance Bypass Cabinet is in the Bypass Mode, it provides an alternate path
for power to the connected equipment. Should the UPS need to be taken out of service for limited
maintenance or repair, manual activation of the bypass will cause an immediate transfer of the equipment from the UPS inverter to the bypass source.
The amber lamp illuminated in the Maintenance Bypass Switch compartment indicates bypass is
available. In this mode of operation the load is NOT protected by the UPS. The Bypass Switch rotated
toward the amber lamp indicates this mode. See 7.0 - Operation for instructions on use.
Figure 4
Bypass operation modes
UPS MODE
BYPASS MODE
Bypass
available
(amber)
UPS ouput
available
(green)
UPS Input source (amber)
ON = AC power supplied to UPS input
OFF = AC power removed from UPS input
7
Major Components
3.0
MAJOR COMPONENTS
The following is a general description of each component and its functions. Please review this section
carefully, as it will give you a better understanding as to how the Nfinity Maintenance Bypass Cabinet operates.
3.1
Bypass Switch
The Bypass Switch allows easy and rapid transfer of connected loads between the UPS and Bypass
source.
3.2
User Selectable Output Distribution
Several receptacle and hardwire options are available as user selectable output distribution. These
are factory configured when ordered and also allow for field upgrades.
Table 1
Common receptacle and hardwire options
15 Amp Options
20 Amp Options
30 Amp Options
5-15R2
5-20R2 (T-slot)
L5-30R
L5-15R2
L5-20R
L6-30R-208
6-15R2-208
L6-20R-208
L6-30R-240
6-15R2-240
L6-20R-240
L14-30R-240
L6-15R2-208
L14-20R-240
30A,120V, 1 pole breaker w/ 1/2" &
3/4" knockouts
L6-15R2-240
20A,120V, 1 pole breaker w/ 1/2" &
3/4" knockouts
30A,208V, 2 pole breaker w/ 1/2" &
3/4" knockouts
15A,120V, 1 pole breaker w/ 1/2" &
3/4" knockouts
20A,208V, 2 pole breaker w/ 1/2" &
3/4" knockouts
30A,240V, 2 pole breaker w/ 1/2" &
3/4" knockouts
15A,208V, 2 pole breaker w/ 1/2" &
3/4" knockouts
20A,240V, 2 pole breaker w/ 1/2" &
3/4" knockouts
15A,240V, 2 pole breaker w/ 1/2" &
3/4" knockouts
Other Options
• Single Position Blanking Plate
• Hardwire Option
3.2.1
Optional Transformer
Models offering a transformer are designed to accept the same input voltage as the UPS and provide
240 / 208 / 120 / 120 output. Models with transformers are provided with redundant cooling fans and
user serviceable fan filters. The fans operate only when the system is in Bypass mode.
8
Preparation
4.0
PREPARATION
These installation instructions provide all the information needed for positioning the Nfinity Maintenance Bypass Cabinet (including environmental requirements) and for connecting the input and output power cables.
4.1
Inspection
Upon receiving the Nfinity Maintenance Bypass Cabinet, examine the packaging for any signs of mishandling or damage. If any damage is noted, contact your local dealer or Liebert representative and
notify your carrier.
4.2
Environment
The Maintenance Bypass Cabinet environment must be free of conductive contaminants and excessive moisture (water condensation), flammable vapors, chemical fumes, or corrosive gases and liquids.
4.3
Required Setup Equipment
The tools below are required in order to properly setup your maintenance bypass cabinet:
•
•
•
•
•
•
4.4
pallet jack
1/2" (13 mm) wrench
torque wrench
flat-head screwdriver
#2 Phillips screwdriver
3/16" (5 mm) Allen wrench
Site Preparation
When deciding where to locate your Maintenance Bypass Cabinet, consider the weight and size of the
unit. Make sure that the structural integrity of the floor can withstand the weight. Refer to the table
below for dimensional considerations:
Table 2
Maintenance Bypass Cabinet physical data
Dimensions
Model
WxDxH
In (mm)
Weight
With Transformer
Without Transformer
9.5 x 26.5 x 30.4
(241.3 x 673.1 x 772.16)
287 lbs (130 kg)
85 lbs (38 kg)
Check to make sure that your Maintenance Bypass Cabinet will be located in a well-ventilated area
with at least 12 inches (304mm) in front of and behind it. Transformer based models are forced air
cooled with the aid of two internal cooling fans.
Figure 5
Clearances
12" (304mm)
12" (304mm)
9
Unloading
5.0
UNLOADING
The unit frame is bolted to the shipping pallet to ensure safety. Liebert recommends using a pallet
jack to transport the unit to its operating location prior to unbolting the unit.
5.1
Unloading the Maintenance Bypass Cabinet
!
CAUTION
This Maintenance Bypass Cabinet is heavy (see weight in Table 2). At least two people
should assist to unload it from the pallet.
1. Once the Maintenance Bypass Cabinet is near the
desired operating location, remove the cardboard
cover.
2. Use a 1/2" (13mm) wrench to remove the eight
mounting bolts (four per bracket) from the pallet
brackets. Remove mounting brackets from the pallet
and Maintenance Bypass Cabinet. Keep brackets and
bolts for future transportation of the Maintenance
Bypass Cabinet or for securing the cabinet to the
floor.
Mounting bolts
in bracket
3. Remove the metal ramp from the bottom of the pallet,
rotating it 180°. Fit ramp onto opposite side of pallet (in slot) as shown below.
Metal ramp
storage area
Ramp fitted
to pallet
4. Using two people, slowly roll the Maintenance Bypass Cabinet down the ramp until the
Maintenance Bypass Cabinet is on a level surface (see below, left).
5. Once the Maintenance Bypass Cabinet is in the desired location, adjust the leveling feet to secure
its position (see below, right).
Ease Maintenance Bypass
Cabinet down ramp
Adjustable
leveling foot
Casters
10
Unloading
Stationary Mounting
Additional stability can be added by bolting the mounting brackets (used in shipping) to the floor.
Mounting bracket
on rear of unit
For greater stability, use a higher-grade bolt. Refer to the dimensions below when drilling holes for
stationary mounting.
4-3/4"
4-3/4"
(120 mm) (120 mm)
28"
(711 mm)
Centerline of Unit
5.2
5/16" (8mm) diameter
6 places
Top View of Maintenance Bypass Cabinet
11
Cable Installation
6.0
CABLE INSTALLATION
6.1
Wiring Preparation
!
WARNING
Please read this section thoroughly before attempting to install wiring to this unit.
Be sure that the unit is not connected to any AC mains power source or UPS before installing any wiring to this unit. This Maintenance Bypass Cabinet should be installed by a qualified / certified electrician.
6.2
Preparing Internal Wiring
The Maintenance Bypass Cabinet is factory-configured for single-source installations. If your installation requires dual-source capabilities, the Maintenance Bypass Cabinet’s wiring must be modified.
6.3
Dual Source Configuration
Modifying the wiring consists of removing the jumpers between TB1 and TB2 as described below:
1.
2.
3.
4.
5.
Figure 6
Remove cover plates.
Identify TB1 and TB2.
Using a 3/16" Allen wrench, loosen terminal mounting jumpers between TB1 and TB2.
Remove jumpers and retighten terminals to 50 in-lb.
Connect primary source to TB2 and secondary source to TB1.
Jumper removal—transformer models and non-transformer models
TRANSFORMER MODELS
GEC
TB1
TB2
Cables to be removed
TB3
NON-TRANSFORMER MODELS
TB1
Cables to be removed
12
TB2
Cable Installation
Figure 7
Maintenance Bypass Cabinet with transformer
Input 2
TB2
Transformer
Single input jumper
(remove for dual
input feeds)
TB1
Input 1
SW2
UPS Input
Switch
CB1
Output
Breaker
TB4
208/240V
Tap Selector
Output
SW1
Bypass
Switch
TB3
TB5
UPS Input
Figure 8
TB6
UPS Output
Maintenance Bypass Cabinet without transformer
Input 2
TB5
TB2
Single input jumper
(remove for dual input feeds)
TB1
Input 1
SW1
Bypass
Switch
CB1
Output
Breaker
SW2
UPS Input
Switch
TB3
TB4
UPS Input
UPS Output
13
Output
Cable Installation
6.4
Removing the Cover Plates
On the back of the Maintenance Bypass Cabinet, cover
plates are over the input and output terminals (see illustration at right). Remove these using a phillips screwdriver. Keep screws and plates to one side.
6.5
Power Cable Installation
Refer to Table 3 below when selecting cables.
Table 3
Nfinity power cable and protection ratings
Models NMB1x & NMB4x
Max Input Current
100 A
Input Protection
100 A
Max Output Current
100 A
Input/ Output
Terminal Details
Max: 2/0 (70 mm2)
Min: 6 AWG (16 mm2)
Models NMB5x & NMB8x
Max Input Current
125 A
Input Protection
125 A
Max Output Current
125 A
Input/ Output
Terminal Details
Max: 2/0 (70 mm2)
Min: 6 AWG (16 mm2)
NOTES
If an output transformer is fitted, the Nfinity Maintenance Bypass has a five-cycle inrush
current that is 10 times the rated output current. This must be taken into account when
selecting the overload protection device at the AC input supply distribution point. To avoid
random tripping on start up, it is recommended that the AC input supply be protected with a
circuit breaker capable of withstanding this initial inrush.
Transient and steady state earth leakage currents may occur when starting the equipment.
This should be taken into account when selecting ground current detection devices, as these
will carry the earth leakage currents of both the UPS equipment and the load.
Table 4
GXT 10kVA power cable & protection ratings
208V
240V
Max Input Current
45A
44A
Input Protection
60A
60A
Max Output Current
43A
42A
Terminal Block Details
6.6
Max: 35 mm2 (2/0 AWG)
Min: 16 mm2 (6 AWG)
REPO Connection
Refer to the Nfinity user manual for information on connecting the REPO.
14
Cable Installation
6.7
Input and Output Wiring
NOTE
Input wiring must be installed using conduit.
208 input voltage jumper—if only the connections for 208 VAC are made between the UPS and
theNfinity Maintenance Bypass, the 208 input voltage jumper must be installed for proper
operation. To install this jumper, place the jumper wire provided in the accessory kit between
Pin 1 and Pin 2 on TB4.
To connect the input wiring:
1. Locate the input wiring access (see
illustration at right).
2. Remove the knockout and pull the three/four
input wires through it, allowing some slack
for installation.
3. Secure the conduit to the rear panel of the
Maintenance Bypass Cabinet.
4. Input power cables connect to hex terminals
on the input terminal block.
5. Insert the ground (earth) wire through the
earth lug and tighten it to the proper torque
value (120 in-lb). Then connect the wires to
the block connections as shown at right. Using
a torque wrench, turn the screws clockwise
until tightened to the proper torque value
(50 in-lb).
NOTE
The Nfinity UPS and Maintenance
Bypass with transformer contain an
isolation transformer that generates a
neutral conductor for the connected
equipment. The UPS and Maintenance
Bypass with transformer are a separately
derived source and contain a
neutral-to-ground bonding jumper. A
grounding electrode conductor (GEC)
must be installed in accordance with
national and local wiring codes and
regulations.
15
Input
Conduit
RIGHT HAND OPTION
( LOOKING FROM FRONT OF UNIT )
REAR VIEW
LEFT HAND OPTION
( LOOKING FROM FRONT OF UNIT )
REAR VIEW
Cable Installation
Figure 9
Electrical connections—transformer model MBC
120V
Common Ground
Wire Connection Torque
Value: 13 in-lbs
240V
208V
120V
Common Ground
Wire Connection Torque
Value: 120 in-lbs
Common Ground
Wire Connection Torque
Value: 120 in-lbs
TB6 Hardwire Output
Terminal Block
Wire Connection Torque
Value: 35 in-lbs
Wire Connection Torque
Value: 120 in-lbs
TB5 UPS Output
Terminal Block
Wire Connection Torque
Value: 28 in-lbs
TB4 Tap Selector
Terminal Block
Wire Connection
Torque Value: 28 in-lbs
TB3 UPS Input
Terminal Block
Wire Connection Torque
Value: 50 in-lbs
TB1 & TB2 Maintenance
Bypass Terminal Blocks
Wire Connection Torque
Value: 50 in-lbs
Common Ground
Wire Connection
Torque Value: 120 in-lbs
GEC (Grounding Electrode Conductor)
Wire Connection Torque Value: 120 in-lbs
16
Cable Installation
Figure 10 Electrical connections—non-transformer model MBC
120V
Common Ground
Wire Connection Torque
Value: 13 in-lbs
240V
208V
Common Ground
Wire Connection Torque
Value: 120 in-lbs
120V
Common Ground
Wire Connection Torque
Value: 120 in-lbs
TB5 Hardwire Output Terminal
Block
Wire Connection Torque
Value: 35 in-lbs
Wire Connection Torque
Value: 120 in-lbs
TB4 UPS Output Terminal
Block
Wire Connection Torque
Value: 28 in-lbs
TB3 UPS Input Terminal
Block
Wire Connection Torque
Value: 28 in-lbs
TB1 Maintenance Bypass Terminal
Block
Wire Connection Torque
Value: 50 in-lbs
TB2 Maintenance Bypass
Terminal Block
Wire Connection Torque
Value: 50 in-lbs
Common Ground
Wire Connection
Torque Value: 120 in-lbs
17
Cable Installation
Figure 11 Connecting Nfinity to Maintenance Bypass with transformer
TB2
L1
Input 2
L2
G
TB1
L1
Input 1
TB6
1
2
3
NFINITY MAINTENANCE BYPASS CABINET
WITH TRANSFORMER
4
Remove these two
wires for dual source
(see NOTE below)
G
G
L2
G
GEC
120
120
208
240
TB3
L1 L2
G
TB4
1 2 3
208
Flexible
conduit
L1 L2
G
1
TB5
2 3 4
G
240
1 2 3
1
2 3 4 5
GEC
TB1
Ensure that both tap
selectors are set to the
correct input voltage
TB2
TB3
See Nfinity
user manual
for details on
connecting
GEC.
NFINITY UPS
NOTE
1. SINGLE-SOURCE FEED—If feeding the Maintenance Bypass Cabinet from a single
source, the input connection may be made to either TB1 or TB2.
2. DUAL-SOURCE FEED—If feeding the Maintenance Bypass Cabinet from a dual source,
the UPS input supply connection must be made to TB1 and the bypass input supply
connection must be made to TB2. The jumpers between TB1 and TB2 must be removed.
3. If connected equipment is a combination of 208 VAC and 120 VAC, use a three-phase panel
board connected to the output terminal TB6.
18
Cable Installation
Figure 12 Connecting Nfinity to Maintenance Bypass without transformer
TB2
L1
Input 2
NFINITY MAINTENANCE BYPASS CABINET
WITHOUT TRANSFORMER
TB5
120
120
208
240
1
L2
2
N
3
4
G
TB1
L1
Remove these three
wires for dual source
(see NOTE below)
G
L2
Input 1
G
N
G
G
TB3
L1 L2
G
L1 L2
G
TB4
2 3 4
1
Flexible
conduit
1 2 3
TB1
Ensure that the tap
selector is set to the
correct input voltage
TB2
1
2
3 4 5
TB3
GEC
See Nfinity
user manual
for details on
connecting
GEC.
NFINITY UPS
NOTE
1. SINGLE-SOURCE FEED—If feeding the Maintenance Bypass Cabinet from a single
source, the input connection may be made to either TB1 or TB2.
2. DUAL-SOURCE FEED—If feeding the Maintenance Bypass Cabinet from a dual source,
the UPS input supply connection must be made to TB1 and the bypass input supply
connection must be made to TB2. The jumpers between TB1 and TB2 must be removed.
3. If connected equipment is a combination of 208 VAC and 120 VAC, use a three-phase panel
board connected to the output terminal TB5.
19
Cable Installation
Figure 13 Connecting Maintenance Bypass to GXT10000T-208X
120V
TB2
L1
Input 2
NFINITY MAINTENANCE BYPASS CABINET WITHOUT
TRANSFORMER
TB5
2
N
3
4
Remove these three wires
for dual source
(see NOTE below)
TB1
208V
1
L2
G
120V
G
L1
G
L2
Input 1
N
TB3
G
L1 L2
G
G
TB4
1
2
3
4
Flexible
conduit
GEC
Flexible
conduit
L1
L2
Input
N
L1
L2
Output
L2A
External Battery
GXT10000T-208X
!
CAUTION
It is mandatory to connect exactly as shown.
NOTE
1. SINGLE-SOURCE FEED—If feeding the Maintenance Bypass Cabinet from a single
source, the input connection may be made to either TB1 or TB2.
2. DUAL-SOURCE FEED—If feeding the Maintenance Bypass Cabinet from a dual source,
the UPS input supply connection must be made to TB1 and the bypass input supply
connection must be made to TB2. The jumpers between TB1 and TB2 must be removed.
3. If connected equipment is a combination of 208 VAC and 120 VAC, use a three-phase panel
board connected to the output terminal TB5.
20
Cable Installation
Figure 14 Connecting Maintenance Bypass to GXT10000T-240X
120V
TB2
L1
Input 2
NFINITY MAINTENANCE BYPASS CABINET WITHOUT
TRANSFORMER
TB5
1
L2
2
N
3
4
Remove these three wires
for dual source
(see NOTE below)
G
TB1
120V
240V
G
L1
G
L2
Input 1
N
TB3
G
L1 L2
G
TB4
G
1
2
3
4
Flexible
conduit
Flexible
conduit
GEC
L1
L2
Input
N
L1
Output
L2
External Battery
GXT10000T-240X
NOTE
1. SINGLE-SOURCE FEED—If feeding the Maintenance Bypass Cabinet from a single
source, the input connection may be made to either TB1 or TB2.
2. DUAL-SOURCE FEED—If feeding the Maintenance Bypass Cabinet from a dual source,
the UPS input supply connection must be made to TB1 and the bypass input supply
connection must be made to TB2. The jumpers between TB1 and TB2 must be removed.
21
Operation
7.0
OPERATION
7.1
Start-Up and Initialization
To start up the Nfinity UPS while it is connected to the Nfinity Maintenance Bypass:
1. Set the Maintenance Bypass switch (SW1) to the UPS position on the Maintenance Bypass
Cabinet.
2. Close the UPS source switch (SW2).
3. Close the output circuit breaker (CB1).
4. Close the input circuit breaker (CB1).
5. On the UPS, close the control enable switch (SW2).
6. After the UPS has initialized, turn the UPS output on by pushing the Standby button.
7.2
Shutting Down the UPS
To power down the UPS system:
1.
2.
3.
4.
5.
7.3
Turn the UPS output Off by pushing the Standby button.
Open the Control Enable switch (SW2) on the UPS.
Open the input circuit breaker (CB1) on the UPS.
Open the UPS Source switch (SW2) on the Maintenance Bypass Cabinet.
Open the output circuit breaker (CB1) on the Maintenance Bypass Cabinet.
Transferring the System from UPS to Maintenance Bypass Operation
1. Verify that the amber Bypass lamp is illuminated
2. Turn the Bypass Switch (SW1) to the bypass position on the Maintenance Bypass Cabinet. The
connected equipment is now powered from the bypass source and is not protected.
7.4
Transferring the System from Maintenance Bypass to UPS Operation
1.
2.
3.
4.
5.
6.
Close the UPS Source Switch (SW2) on the Maintenance Bypass Cabinet.
Close the input circuit breaker (CB1) on the UPS.
Close the Control Enable Switch (SW2) on the UPS.
Turn the UPS output On by pushing the Standby button on the UPS.
Verify that the green UPS lamp is illuminated.
Turn the Bypass Switch to the bypass position on the Maintenance Bypass Cabinet.
22
Maintenance
8.0
MAINTENANCE
8.1
Proper Care
Keeping your Liebert Nfinity Maintenance Bypass Cabinet operating properly is imperative to optimal performance and life of the unit. It is recommended that a certified technician perform preventive
and corrective maintenance. Liebert Global Services (LGS) is dedicated to ensuring the highest level
of performance and unmatched support for your Nfinity Maintenance Bypass Cabinet. Contact an
LGS representative for services to guarantee maximum reliability and system availability.
8.2
Scheduled Maintenance
Liebert recommends performing the following maintenance at least monthly:
• Check, clean and replace filters.
• Verify that airflow is not obstructed.
Liebert recommends performing the following maintenance annually:
• Verify all power connections.
• Verify that all output distribution modules are operating properly.
8.2.1
Replacing Fan Filters—Transformer Models Only
The Maintenance Bypass Cabinet intake fans contain filters that will need to be replaced or cleaned
periodically, depending on the surrounding environment. Check by noting the condition of the two filters. If filters are dirty, replace or wash them. The filters may be taken out of the UPS for replacement or cleaning by removing the plastic cover over the filter frame. Use caution when replacing
filters when fans are running.
Fan Filters
The fan filters are washable and may be reused. To wash these filters, place them under a running
faucet (with the dirty side down) to remove dirt and dust. Blot dry with a towel and allow to air-dry
before reusing it.
23
Specifications
9.0
SPECIFICATIONS
General & Environmental
Rating
Models NMB1x and NMB4x = 18
kVA
Models NMB5x and NMB8x = 20
Unit Rating
Models NMB1x and NMB4x = 100 max
Amps
Models NMB5x and NMB8x = 125 max
Safety Standards
UL 1778, c-UL
Mechanical
Width
Depth
Dimensions
9.5 (241)
In (mm)
26.5 (700)
Height
30.4 (775)
287 (130)
transformer model
85 (39)
transformerless model
Weight
lb (kg)
Operating Temperature (max)
F (C)
32º - 104º (0º - 40º)
Environmental
Relative Humidity
Maximum Operating Altitude
%
0-95% non-condensing
Ft (M)
10,000 (3000)
VAC
208 or 240
Input Data
Nominal Input Voltage
Input Frequency (nominal)
Hz
60
Input Frequency Range
Hz
55-65
Output Data
208/240
240
208
120/120/208/240
120/120/240*
120/120/208*
Output Voltage
VAC
Transfer Time
msec
<4 msec typical
Hz
60
Output Frequency
* Transformerless model requires neutral input
24
Specifications
NOTES
25
Specifications
26
POWER AVAILABILITY
MAINTENANCE BYPASS CABINET FOR NFINITY™
& GXT 10KVA
USER MANUAL
The Company Behind the Products
With over a million installations around the globe,
Liebert is the world leader in computer protection
systems. Since its founding in 1965, Liebert has
developed a complete range of support and
protection systems for sensitive electronics:
•
•
•
•
•
Environmental systems—close-control air
conditioning from 1 to 60 tons
Power conditioning and UPS with power
ranges from 300 VA to more than 1000 kVA
Integrated systems that provide both
environmental and power protection in a
single, flexible package
Monitoring and control—from systems of any
size or location, on-site or remote
Service and support through more than 100
service centers around the world and a 24/7
Customer Response Center
While every precaution has been taken to ensure
the accuracy and completeness of this literature,
Liebert Corporation assumes no responsibility and
disclaims all liability for damages resulting from
use of this information or for any errors or
omissions.
© 2005 Liebert Corporation
All rights reserved throughout the world.
Specifications subject to change without notice.
® Liebert and the Liebert logo are registered
trademarks of Liebert Corporation. All names
referred to are trademarks or registered
trademarks of their respective owners.
SL-23960 (4/05) Rev. 4
Technical Support/Service
Web Site
www.liebert.com
Monitoring
800-222-5877
monitoring@liebert.com
Outside the US: 614-841-6755
Single-Phase UPS
800-222-5877
upstech@liebert.com
Outside the US: 614-841-6755
Three-Phase UPS
800-543-2378
powertech@liebert.com
Environmental Systems
800-543-2778
Outside the United States
614-888-0246
Locations
United States
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Italy
Via Leonardo Da Vinci 8
Zona Industriale Tognana
35028 Piove Di Sacco (PD)
+39 049 9719 111
Fax: +39 049 5841 257
Asia
23F, Allied Kajima Bldg.
138 Gloucester Road
Wanchai
Hong Kong
+852 2 572 2201
Fax: +852 2 831 0114